Improvement in tire-bending machines



F. E. GDLEMAN.

Tire-Bending Machines. No. 138,231. ParentedApmzgnma.

fis, 2

W/TNEJQES AM. PHoro-L/rHoGHAPH/c Lo. w(ossamvs.'9 Princess.)

UNITED STATESY PATENT OFFICE.

FRANK E. COLEMAN, OF KIRKWOOD, NEV YORK.

IMPROVEMENT IN TIRE-BENDING MACHINES.

Specification forming part of Letters Patent No. 138,231, dated April29, 1873; application filed November 11, 1872.

To all whom it may concern:

Be it known that I, FRANK E. COLEMAN, of Kirkwood, in the county ofBroome and State of New York, have invented certain new and usefulImprovements in Machines for Bending Tire, and I do hereby declare thefollowing to be a full, clear, and exact description of the same, suchas will enable others skilled in the art to which it pertains to makeand use it, reference being had to the accompanying drawing, which formsa part of this specification, and in which- Figure l is a sideelevation. Fig. 2 is a plan or top view. Fig. 3 is a detached view ofone of the bearing-blocks in which the upper roller is mounted; and Fig.4 is a detached view of one of the set-screws employed to raise andlower the upper roller.

The invention relates to that class of tirebending machines in which.the two outside rollers are mounted in fixed bearings, and are connectedwith each other and driven by means of an intermediate gear, the centralroller being made adjustable vertically for the purpose of deecting thetire between the two outside rollers, and thus giving it (the tire) aproper curvature. The invention consists in certain details ofconstruction and arrangement of parts, which will be fully explained.

In the accompanying drawing, A A is the main frame. B B are two rollersmounted in suitable bearings formed in or attached to the main frame.The journals of these rollers extend beyond the frame and have coggedgears C C keyed to them. D D are intermediate gears mounted uponstud-axles projecting from the frame A A, or from a bracket or pendanthanging from either side thereof. E E are pinions keyed to a shaft, E',which rotates in the lower ends of the pendants. Pinions E gear withwheels D, and the ends of shaft E are squared to receive cranks as at F.It will be readily seen that when power is applied to the cranks therollers B B are both driven in the same direction of rotation. b b areposts rising from each side of the frame and connected at their upperends by girts b. G is a roller, the journals of which are mounted inbearing-blocks H of a peculiar construction, as follows: One of theseblocks is shown in detached view, Fig. 3. Each end of this block isgrooved, as at h, which adapts it to slide vertically upon correspondingribs c c on the inner faces of the posts b. These ribs c do not extendthe entire height of the posts, but have their upper ends cut away inorder that bearing-blocks may be removed from their position between theposts b b without first removing the caps 0r girts b. Each block H has arecess or chamber, h', in its inner and upper side, the recess beingcovered by a plate, d, which has a throat, j', in it. I, Figs. l and 4,is a set-screw working in a thread cut in cap b', there being one ofthese screws at each end of roller G. The lower end of each set-screwhas a groove cut in it, as at c, thus forming a small shank, which willenter the throat f in plate d of block H. 'lhe groove c should be wideenough to permit the end of the screw to bear directly upon the block,and thereby avoid all danger of breaking said plate when the screw isbeing turned down. When the screw is turned up the lip or ange c willengage with the under side of plate d and lift the bearing-block androller H.

In operating my machine I elevate the roller G until I can thrust thebar (of which the tire is to be formed) under it, so that it (the bar)shall rest upon both rollers B B1, and then screw roller G down untilthe bar is bent, when, by turning the cranks, the tire may be formed asin other machines of this class. By preference I flute or otherwiseroughen the surfaces of rollers B B in order to give them the desiredbite77 To remove the tire from the machine I draw the bearing-blocks Hup until their lower faces are above the upper ends of the ribs c, andthen take the blocks and roller Gr out of the machine, thus releasingthe tire.

I regard my combination and arrangement of gearing as being veryadvantageous, be-

cause it enables me to use a through shaft with a crank on each end andsmall drivingpinions, as the employment of the intermediates D D allowsthe shaft E to be placed so far below rollers B B that the tire is neverbent down far enough to touch it. This gives me a great leverage uponthese rollers, and also applies the power equallyupon both sides of themachine.

My construction of parts permits the ready removal of the upper rollerG, yet insures ribs c c, and the bearing-blocks H provided greatsimplicity, strength, and durability. with recesses h and throats f,substantially as Having thus described my invention, what set forth. Iclaim as new, is FRANK E. COLEMAN.

In a machine for bending tire, in combina- Witnesses: tion with theroller G and setserews I, the yWM. M. CROSBY,

posts or frame b b b provided with ways 0r J. C. ROBIE.

